1.	Simplify 1 Simplify the following expression: $$ \left({2}^{2} + -3(-1)\right)2\left(2 - -4\right) $$ Correct Answer $$ 84$$ or 84.0000

2.	Simplify 2 Simplify the following expression: $$ {\left(-6 - -5\right)}^{2} + -5(-4) - \frac{-3}{5} $$ Correct Answer $$ \frac{108}{5}$$ or 21.6000

3.	Fractions 1 Simplify the following expression: $$ \frac{2}{3} + \frac{6}{5} $$ Correct Answer $$ \frac{28}{15}$$ or 1.8666666666666667

4.	Fractions 2 Simplify the following expression: $$ \frac{5}{3}\frac{-2}{6} $$ Correct Answer $$ \frac{-5}{9}$$ or -0.5555555555555556

5.	Significant figures 1. Write the following to 5 significant figures: 0.75213874 Correct Answer 0.75214 or $$7.5214\times10^{-1}$$ 2. Write the following to 3 significant figures: 0.00037499914 Correct Answer 0.000375 or $$3.75\times10^{-4}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 11.6624 Correct Answer $$1.1662\times10^{1}$$ 2. Write the following in standard form to 4 significant digits: 0.000000428998 Correct Answer $$4.290\times10^{-7}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 1.6444 Correct Answer $$1.644\times10^{0}$$ 2. Write the following in preferred standard form to 2 significant digits: 135.5 Correct Answer $$140\times10^{0}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{6 + 1}{3 + 1} + {\left(-4 - 3\right)}^{2} $$ Correct Answer $$ \frac{203}{4}$$ or 50.7500

9.	Simplify 1 Simplify the following expression: $$ 2(-3)(-2)\left(-4(-6) + -6\times6\right) $$ Correct Answer $$ -144$$ or -144.000

10.	Simplify 2 Simplify the following expression: $$ {\left(-5 - 1\right)}^{\left(1 - 1\right)}2\left(1 - 6\right) $$ Correct Answer $$ -10$$ or -10.0000